Okey, so here in Sweden we have a pretty high standard for LARPs. We have some of the coolest organizers I know of and that tend to lead to really awesome things. Like this one time during a post apocalyptic LARP and a airplane started to drop bombs. Or this one time when a huge fire breathing dragon attacked a town built from scratch.
Anyway, one of the latest and coolest LARPs that just ended is The Monitor Celestra. In which the organizers rebuilt the real Swedish destroyer-class ship Småland and turned it into a real frakkin' spaceship.
The above video is a documentary from the last game they held. I was invited to play in it but well... I have to much stuff going on in my life. None the less. Enjoy!
Read more about it here: http://www.celestra-larp.com/